Noometry

Alternatives

Best Open-Source Claude Alternatives in October 2026

The strongest open-weight alternative to Claude as of October 2026 is Kimi K3 from Moonshot AI: 9.5 points behind Claude Fable 5.1, 3.3× cheaper per token; open weights. Compared against Claude Fable 5.1, Claude's current top model.

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  1. Kimi K3 Moonshot AI

    9.5 points behind Claude Fable 5.1, 3.3× cheaper per token; open weights.

    Score 59.5, $6 per M tokens blended.Compare with Claude Fable 5.1

  2. GLM-5.3 Z.ai (Zhipu)

    14.2 points behind Claude Fable 5.1, 9.3× cheaper per token; open weights.

    Score 54.8, $2.15 per M tokens blended.Compare with Claude Fable 5.1

  3. DeepSeek V4 Pro DeepSeek

    14.7 points behind Claude Fable 5.1, 20.2× cheaper per token; open weights.

    Score 54.3, $0.99 per M tokens blended.Compare with Claude Fable 5.1

  4. MiMo-V2.6-Pro Xiaomi

    18.8 points behind Claude Fable 5.1, 36.8× cheaper per token; open weights.

    Score 50.3, $0.54 per M tokens blended.Compare with Claude Fable 5.1

  5. Inkling-Small Thinking Machines Lab

    22.6 points behind Claude Fable 5.1, 31.4× cheaper per token; open weights.

    Score 46.5, $0.64 per M tokens blended.Compare with Claude Fable 5.1

  6. Qwen3.5 397B-A17B Alibaba (Qwen)

    23.0 points behind Claude Fable 5.1, 14.8× cheaper per token; open weights.

    Score 46.0, $1.35 per M tokens blended.Compare with Claude Fable 5.1

  7. Hy4 preview Tencent

    23.8 points behind Claude Fable 5.1, 17.8× cheaper per token; open weights.

    Score 45.3, $1.13 per M tokens blended.Compare with Claude Fable 5.1

  8. MiniMax-M3 MiniMax

    25.3 points behind Claude Fable 5.1, 38.1× cheaper per token; open weights.

    Score 43.8, $0.52 per M tokens blended.Compare with Claude Fable 5.1

More: All alternatives, Cheaper, For coding

Frequently asked questions

What is the best alternative to Claude?

The strongest open-weight alternative to Claude as of October 2026 is Kimi K3 from Moonshot AI: 9.5 points behind Claude Fable 5.1, 3.3× cheaper per token; open weights. Compared against Claude Fable 5.1, Claude's current top model.

How were these alternatives chosen?

Each is the highest-ranked model from a different provider with downloadable weights, compared on the Noometry Index against Claude Fable 5.1.